It is unlikely to be nylon simply because it would be a poor choice for a 
“first print.” 

Nylon is highly hygroscopic and needs to be be dried before printing. In some 
environments it will absorb enough moisture in a day to make it unprintable.
It also has a thermal expansion coefficient that is similar to ABS, which makes 
it more difficult to keep from lifting and warping. And it needs to be printed 
hotter than ABS.


It might be PETG?

> 
> It came with a small hank of semi-white, might be nylon but I've no clue 
> what it actually is. Sealed in a clear poly bag, along with an unlabeled 
> nozzle and entry connection for the feed tube from the ejector motor. 
> Looks to be the same size as the black stuff but has that faintly 
> translucent color of nylon.  Might be enough to make two of this 
> sprocket.  Not enough to get familiar with it and make good stuff.

As for printing a gt2 2mm sprocket, I can’t do it well with my dinosaur of a 
printer. And not for lack of trying, as I have a whole bucket full of nema 17 
and nema 23 stepper motors I collected from junked office printers. Almost 
every one of them has a press-fit gt2 2mm sprocket. Perhaps if I could slow it 
down for fine details it might work better but as such, all I get is correctly 
spaced bumps instead of tooth profiles. I’ve had my friend print me a few gears 
with one of those Prussia-style printers with much better results, so it is 
doable.

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